Question about 1980 Yamaha XS 650 G
Here is how you think of it: The solenoid is a switch, in terms of the wiring. One big cable in, from the battery needs to connect to one big going out. These two terminals are larger and have a different size fastener and washer, than "the smaller one(s).
So a solenoid is an electromagnetic switch that in normally open (not allowing current between the contacts).
WHEN you put a voltage to the smaller terminal, the magnet energizes, and contact is made between the two big terminals, stop the voltage to this small terminal and the switch opens.
So, some soleniods have two smaller terminals. The puropse of the 2nd smaller terminal is to allow more voltage to be directed to the coil, only during starter engaugement. The reason for this is voltage to the coil has to be reduced, during normal operation, but this would not be enough during starting.
So, like an analog clock face, most are oriented as follows. 12 o'clock position is battery cable heavy in, 6 o'clock position is heavy out to the starter, 2 o'clock position is switch energize, and 10 o'clock position is coil feed out (light).
I figure the battery cable and starter out wires are self evident, by size. IF you were to reverse the light two wires, nothing happens, and no damage, reverse to the correct position and off you go.
Posted on Mar 31, 2011
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Posted on Jan 02, 2017
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